Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 20, Problem 26P
To determine
Themain criteriasthat are used for evaluating a trial
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For the following temperature conditions, calculate the proper PG grade for both 50% and 98% reliabilities (show your calculation).Seven-day maximum pavement temperature of 48°C with a standarddeviation of 2.5°C. Minimum pavement temperature of -21°C with a standard deviation of 3°C.
3. The AASHTO present serviceability index (PSI) correlates the PSR to actual pavement performance in terms of applied traffic, and select distresses.a. Trueb. False
a) Discuss the strategy of pavement evaluation process in detail?
b) Write short notes on Dynamic Cone Penetrometer and Road Dynaflect?
Chapter 20 Solutions
Traffic and Highway Engineering
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- Repeat Problem 19-7 using two different depths of untreated aggregate bases of 6 in. and 12 in. Highway contractors in your area can furnish rates for providing and properly laying an asphalt concrete surface and untreated granular base. Assume a structural coefficient of 0.12 for the base course. If these rates are available, determine the cost for constructing the different pavement designs if the highway section is 5 miles long and the lane width is 12 ft. Which design will you select for construction?arrow_forwardQ#3. Discuss root causes and remedial measures of the following distresses occurring in flexible pavements: Slippage failure, Potholes, Rutting and its types, Bitumen bleedingarrow_forwardquestion 2 please, Pavementarrow_forward
- Define precisely the difference between pavement serviceability and performance. Using a sketch to indicate the concept of remaining service life of a pavement segment.arrow_forwardPlease answer clearly Explain root causes and remedial measures of the following distresses occurring in flexible pavements: Slippage failure, Potholes, Rutting and its types, Bitumen bleeding ?arrow_forwardDiscuss the strategy of pavement evaluation process in detailarrow_forward
- A flexible pavement has a structural number of 3.8(all drainage coefficients are equal to 1.0). The initialPSI is 4.7 and the terminal serviceability is 2.5. The soilhas a CBR of 9. The overall standard deviation is 0.40and the reliability is 95%. The pavement is currentlydesigned for 1800 equivalent 18-kip single-axle loadsper day. If the number of 18-kip single-axle loads wereto increase by 30%, by how many years would thepavement’s design life be reduced?arrow_forwardReplace the 5 forces acting on the next pavement with a single force and position it so as to obtain a equivalent system.arrow_forwardDescribe the pavement design. Discuss are the main features of rigid and flexible pavement.arrow_forward
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